Obtains the number of unique frames found inside the FLAC tag. The identifier of each unique frame can be obtained through the TagsReader.FLAC_UniqueFramesIdGet method.

Multiple instances of the picture frame can be available inside the same FLAC tag: when this method is called, the enumeration will not keep count of multiple instances of a specific frame but will only report the availability of the frame itself; once the availability of a specific frame is known, single specific picture frames can be enumerated using the TagsReader.FLAC_PictureFrameCountGet method.

For further details about methods related to tags reading refer to the TagsReaderMan class.